mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-03 22:16:48 +07:00
76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
|
/*
|
||
|
|
* linux/arch/arm/include/asm/pmu.h
|
||
|
|
*
|
||
|
|
* Copyright (C) 2009 picoChip Designs Ltd, Jamie Iles
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License version 2 as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __ARM_PMU_H__
|
||
|
|
#define __ARM_PMU_H__
|
||
|
|
|
||
|
|
#ifdef CONFIG_CPU_HAS_PMU
|
||
|
|
|
||
|
|
struct pmu_irqs {
|
||
|
|
const int *irqs;
|
||
|
|
int num_irqs;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* reserve_pmu() - reserve the hardware performance counters
|
||
|
|
*
|
||
|
|
* Reserve the hardware performance counters in the system for exclusive use.
|
||
|
|
* The 'struct pmu_irqs' for the system is returned on success, ERR_PTR()
|
||
|
|
* encoded error on failure.
|
||
|
|
*/
|
||
|
|
extern const struct pmu_irqs *
|
||
|
|
reserve_pmu(void);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* release_pmu() - Relinquish control of the performance counters
|
||
|
|
*
|
||
|
|
* Release the performance counters and allow someone else to use them.
|
||
|
|
* Callers must have disabled the counters and released IRQs before calling
|
||
|
|
* this. The 'struct pmu_irqs' returned from reserve_pmu() must be passed as
|
||
|
|
* a cookie.
|
||
|
|
*/
|
||
|
|
extern int
|
||
|
|
release_pmu(const struct pmu_irqs *irqs);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* init_pmu() - Initialise the PMU.
|
||
|
|
*
|
||
|
|
* Initialise the system ready for PMU enabling. This should typically set the
|
||
|
|
* IRQ affinity and nothing else. The users (oprofile/perf events etc) will do
|
||
|
|
* the actual hardware initialisation.
|
||
|
|
*/
|
||
|
|
extern int
|
||
|
|
init_pmu(void);
|
||
|
|
|
||
|
|
#else /* CONFIG_CPU_HAS_PMU */
|
||
|
|
|
||
|
|
static inline const struct pmu_irqs *
|
||
|
|
reserve_pmu(void)
|
||
|
|
{
|
||
|
|
return ERR_PTR(-ENODEV);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int
|
||
|
|
release_pmu(const struct pmu_irqs *irqs)
|
||
|
|
{
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int
|
||
|
|
init_pmu(void)
|
||
|
|
{
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* CONFIG_CPU_HAS_PMU */
|
||
|
|
|
||
|
|
#endif /* __ARM_PMU_H__ */
|